<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        /*
            类式组件的定义:
            -声明一个类.继承React.Component

            使用类式组件:
              识别组件类型是类式组件=>寻找类式组件的定义=>生成类式组件的实例=>调用实例身上的render方法,拿到虚拟DOM
        
        */
        class Parent extends React.Component{
            render() {
                return <h2>我是你爸爸</h2>
            }
        }

        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(<Parent />)

    </script>
</body>

</html>